Projects per year
Abstract
Recently, two fast selective encryption methods for context-adaptive variable length coding and context-adaptive binary arithmetic coding in H.264/AVC were proposed by Shahid et al. In this paper, it was demonstrated that these two methods are not as efficient as only encrypting the sign bits of nonzero coefficients. Experimental results showed that without encrypting the sign bits of nonzero coefficients, these two methods can not provide a perceptual scrambling effect. If a much stronger scrambling effect is required, intra prediction modes, and the sign bits of motion vectors can be encrypted together with the sign bits of nonzero coefficients. For practical applications, the required encryption scheme should be customized according to a user's specified requirement on the perceptual scrambling effect and the computational cost. Thus, a tunable encryption scheme combining these three methods is proposed for H.264/AVC. To simplify its implementation and reduce the computational cost, a simple control mechanism is proposed to adjust the control factors. Experimental results show that this scheme can provide different scrambling levels by adjusting three control factors with no or very little impact on the compression performance. The proposed scheme can run in real-time and its computational cost is minimal. The security of the proposed scheme is also discussed. It is secure against the replacement attack when all three control factors are set to one.
Original language | English |
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Article number | 6469203 |
Pages (from-to) | 1476-1490 |
Journal | IEEE Transactions on Circuits and Systems for Video Technology |
Volume | 23 |
Issue number | 9 |
DOIs | |
Publication status | Published - 22 Feb 2013 |
Keywords
- H.264/AVC
- intra prediction mode
- motion vectors
- nonzero coefficients
- selective encryption
- sign bits
- tunable
- DIGITAL VIDEO
- COMPRESSION STANDARD
- ALGORITHMS
- PROTECTION
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Media Technology
Projects
- 1 Finished
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R1118ECI: Centre for Secure Information Technologies (CSIT)
McCanny, J. V., Cowan, C., Crookes, D., Fusco, V., Linton, D., Liu, W., Miller, P., O'Neill, M., Scanlon, W. & Sezer, S.
01/08/2009 → 30/06/2014
Project: Research